公开(公告)号：US4253911A

公开(公告)日：1981-03-03

申请号：US771705

申请日：1977-02-24

申请人： Per A. R. Hillstrom ,  Kent I. Sondell

发明人： Per A. R. Hillstrom ,  Kent I. Sondell

IPC分类号： D21C11/00 ,  D21C11/02 ,  D21C11/04

CPC分类号： D21C11/0071 ,  Y10S162/08 ,  Y10S423/03

摘要： A process is provided for the separation of sodium chloride in the sodium chemicals recovery stage of sodium-based pulp manufacturing processes so as to maintain a low sodium chloride content in the recycled sodium chemicals, comprising the steps of treating an aqueous sodium chloride-containing solution with carbon dioxide gas, thereby forming a saturated sodium bicarbonate solution; precipitating sodium values of the solution as sodium bicarbonate while retaining sodium chloride in solution; separating such sodium bicarbonate; withdrawing the residual aqueous sodium chloride-containing solution from the process; and recycling the separated sodium bicarbonate.

摘要翻译： 提供了一种用于在钠基纸浆制造方法的钠化学品回收阶段中分离氯化钠以便在再循环的钠化学品中保持低氯化钠含量的方法，包括以下步骤：将含氯化钠水溶液 用二氧化碳气体，从而形成饱和碳酸氢钠溶液; 将溶液中的钠值沉淀为碳酸氢钠，同时将氯化钠保持在溶液中; 分离此类碳酸氢钠; 从该方法中取出残留的含氯化钠水溶液; 并回收分离的碳酸氢钠。

公开(公告)号：US4273612A

公开(公告)日：1981-06-16

申请号：US46742

申请日：1979-06-08

申请人： Per A. R. Hillstrom ,  Lars G. Norehall

发明人： Per A. R. Hillstrom ,  Lars G. Norehall

IPC分类号： D21C9/02

CPC分类号： D21C9/02 ,  Y10S162/10

摘要： A process is provided for continuously washing fibrous suspensions in aqueous suspending liquors containing dissolved impurities to remove such impurities by exchanging aqueous suspending liquid substantially free from such impurities for the aqueous suspending liquor, which comprises washing fibrous material of the suspension in aqueous suspending liquid substantially free from dissolved impurities; and forming a washed fibrous suspension in such liquid; withdrawing aqueous suspending liquor containing dissolved impurities; diluting the washed fibrous suspension by adding aqueous suspending liquid substantially free from dissolved impurities; measuring the volume amount of such diluting aqueous suspending liquid added; measuring the volume amount of diluted washed fibrous suspension; and then adjusting the volume amount of wash liquid added to maintain substantially constant the difference between the amount of wash liquid added and the liquid content of the undiluted washed fibrous suspension.

摘要翻译： 提供了一种方法，用于连续洗涤含有溶解杂质的水悬浮液中的纤维悬浮液，以通过交换水性悬浮液基本上不含这种杂质的水性悬浮液来除去这些杂质，其包括将基本上无水的悬浮液中的悬浮液的纤维材料 来自溶解的杂质; 并在这种液体中形成洗涤的纤维悬浮液; 取出含有溶解杂质的水性悬浮液; 通过添加基本上不含溶解的杂质的水性悬浮液稀释洗涤的纤维悬浮液; 测量添加的稀释水性悬浮液的体积量; 测量经稀释洗涤的纤维悬浮液的体积量; 然后调整加入的洗涤液的体积量，以保持加入的洗涤液量与未稀释的洗涤过的纤维悬浮液的液体含量之间的差异。

公开(公告)号：US4138313A

公开(公告)日：1979-02-06

申请号：US785399

申请日：1977-04-07

申请人： Per A. R. Hillstrom ,  Lars G. Norehall

发明人： Per A. R. Hillstrom ,  Lars G. Norehall

IPC分类号： D21C9/02

CPC分类号： D21C9/02 ,  Y10S162/10

摘要： A process and apparatus are provided for controlling the supply of aqueous suspending liquid in continuously washing fibrous suspensions in aqueous suspending liquors containing dissolved impurities, to remove such impurities by exchanging aqueous suspending liquors substantially free from such impurities for the aqueous suspending liquor, which comprises washing fibrous material of the suspension in aqueous suspending liquid substantially free from dissolved impurities, and forming a washed fibrous suspension in such liquid; withdrawing aqueous suspending liquor containing dissolved impurities; diluting the washed fibrous suspension by adding aqueous suspending liquid substantially free from dissolved impurities; determining the amount of dissolved impurities remaining with the fibrous suspension after the washing has been completed by measuring (1) the volumetric flow rate of the washed suspension; (2) the liquid content of the washed suspension; and (3) the content of dissolved impurities in the suspending liquid; and then controlling the volume amount of wash liquid added according to the washing losses to maintain washing losses within a predetermined limiting range.

摘要翻译： 提供了一种方法和装置，用于控制水性悬浮液在连续洗涤含有溶解杂质的含水悬浮液中的纤维悬浮液的供应，以通过交换水性悬浮液基本上不含这种杂质的水性悬浮液来除去这些杂质，其包括洗涤 悬浮液的水性悬浮液中的纤维材料基本上不含溶解的杂质，并在这种液体中形成洗涤的纤维悬浮液; 取出含有溶解杂质的水性悬浮液; 通过添加基本上不含溶解的杂质的水性悬浮液稀释洗涤的纤维悬浮液; 通过测量（1）洗涤的悬浮液的体积流量，确定洗涤完成后纤维悬浮液残留的溶解杂质的量; （2）洗涤悬浮液的液体含量; 和（3）悬浮液中溶解杂质的含量; 然后根据洗涤损失控制加入的洗涤液的体积量，将洗涤损失维持在规定的限制范围内。